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可变密度    
相关语句
  variable density
    STUDY ON NATURAL DAHURIAN LARCH STAND GROWTH MODEL AND VARIABLE DENSITY YIELD TABLE
    兴安落叶松天然林林分生长模型和可变密度收获表的研究
短句来源
    THE ESTABLISHMENT OF VARIABLE DENSITY YIELD TABLE FOR CHINESE FIR PLANTATION IN DAGANGSHAN EXPERIMENT BUREAU
    大岗山实验局杉木人工林可变密度收获表的编制
短句来源
    Study on Method of Constructing Variable Density Yield Table
    兴安落叶松天然林可变密度收获表编制法的研究
短句来源
    The Establishment of Variable Density Yield Table for the Chinese Fir Plantation in Kaihua
    浙江开化杉木人工林可变密度收获表的编制
短句来源
    The Variable Density Yield Table of Artificial Cunninghamia lanceolata Forest
    杉木人工林可变密度收获表的编制
短句来源
更多       
  variable-density
    Study on Drawing up Variable-density Yield Tables with the Control Chart of Stand Density
    用林分密度控制图编制可变密度收获表的研究
短句来源
    On Drawing up the Variable-density Yield Table for Chinese Fir Plantation
    杉木人工林可变密度收获表的编制
短句来源
    Studies on the Variable-Density Whole Stand Model of Cunninghamia lanceolata Plantations and Its Application
    杉木人工林可变密度的全林分模型及其应用研究
短句来源
    Based on foregoing information, density index of stand was led into drowing control chart of stand density into variable-density yield table so that the outputting results between chart and table were correspondant, this provided a method for drawing up variable-density yield tables, simplex method.
    引入林分密度指数,将林分密度控制图导成可变密度收获表,保证了图表之间输出结果的一致性,为可变密度收获表的编制提供了一种方法。
短句来源
  variable density
    STUDY ON NATURAL DAHURIAN LARCH STAND GROWTH MODEL AND VARIABLE DENSITY YIELD TABLE
    兴安落叶松天然林林分生长模型和可变密度收获表的研究
短句来源
    THE ESTABLISHMENT OF VARIABLE DENSITY YIELD TABLE FOR CHINESE FIR PLANTATION IN DAGANGSHAN EXPERIMENT BUREAU
    大岗山实验局杉木人工林可变密度收获表的编制
短句来源
    Study on Method of Constructing Variable Density Yield Table
    兴安落叶松天然林可变密度收获表编制法的研究
短句来源
    The Establishment of Variable Density Yield Table for the Chinese Fir Plantation in Kaihua
    浙江开化杉木人工林可变密度收获表的编制
短句来源
    The Variable Density Yield Table of Artificial Cunninghamia lanceolata Forest
    杉木人工林可变密度收获表的编制
短句来源
更多       
  variable density
    STUDY ON NATURAL DAHURIAN LARCH STAND GROWTH MODEL AND VARIABLE DENSITY YIELD TABLE
    兴安落叶松天然林林分生长模型和可变密度收获表的研究
短句来源
    THE ESTABLISHMENT OF VARIABLE DENSITY YIELD TABLE FOR CHINESE FIR PLANTATION IN DAGANGSHAN EXPERIMENT BUREAU
    大岗山实验局杉木人工林可变密度收获表的编制
短句来源
    Study on Method of Constructing Variable Density Yield Table
    兴安落叶松天然林可变密度收获表编制法的研究
短句来源
    The Establishment of Variable Density Yield Table for the Chinese Fir Plantation in Kaihua
    浙江开化杉木人工林可变密度收获表的编制
短句来源
    The Variable Density Yield Table of Artificial Cunninghamia lanceolata Forest
    杉木人工林可变密度收获表的编制
短句来源
更多       
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  variable density
Motion of a shock wave through a gas of variable density
      
A successive approximation method is used to solve the self-similar problem of gas flow accompanying a shock wave propagated through a polytropic gas of variable density.
      
Inviscid flow in the neighborhood of the stagnation point of a blunt body with variable density along the axis
      
Expansion characteristics of twisted jets of variable density
      
A qualitative study of self-similar flows with consideration of possible initial gas motion is performed for the problem of motion of a variable density gas in shock tubes with varying cross section.
      
更多          
  variable-density
Population inversion behind a detonation wave propagating in a variable-density medium
      
Self-similar axisymmetric thermal in a variable-density medium
      
We present a variable-density formation separation technique to address this problem.
      
Study on the method of constructing variable-density yield table
      
Variable-density yield tables of old-growth Larch are constructed based on growth equation of stand average DBH and relationship between stand average DBH and the other stand attributes.
      
更多          
  variable density
Motion of a shock wave through a gas of variable density
      
A successive approximation method is used to solve the self-similar problem of gas flow accompanying a shock wave propagated through a polytropic gas of variable density.
      
Inviscid flow in the neighborhood of the stagnation point of a blunt body with variable density along the axis
      
Expansion characteristics of twisted jets of variable density
      
A qualitative study of self-similar flows with consideration of possible initial gas motion is performed for the problem of motion of a variable density gas in shock tubes with varying cross section.
      
更多          
  variable density
Motion of a shock wave through a gas of variable density
      
A successive approximation method is used to solve the self-similar problem of gas flow accompanying a shock wave propagated through a polytropic gas of variable density.
      
Inviscid flow in the neighborhood of the stagnation point of a blunt body with variable density along the axis
      
Expansion characteristics of twisted jets of variable density
      
A qualitative study of self-similar flows with consideration of possible initial gas motion is performed for the problem of motion of a variable density gas in shock tubes with varying cross section.
      
更多          


The variable density yield table is established for Chinese fir plantation in Dagangshan Experiment Bureau, which is based on generalized Richards growth model, in which site index and density index are included. Errors in the model are analyzed. The results show that the table is suitable for Chinese fir plantation in this Bureau and the method proposed in the paper is satisfying.

本文利用推广的 Richards 生长模型编制了大岗山实验局杉木人工林的可变密度收获表,在这模型中包括地位指数及密度指数。误差分析表明此表适用于该地区的杉木人工林,这种编表方法是一种较好的方法。

The variable density yield table of young and middle age stands of dahurian larch (Larix gmelinii Rupr) in Daxing′anling district were compiled base on the growth theory of Von Bertalanffy. We have developed time-site-density continuous equations and studied the growth and yield of DBH, height, basal area and volume of different origins, sites and densities of dahurian larch. The result reflected the present growth situation of dahurian larch and provided the theoretical basis for constructing forestry tables...

The variable density yield table of young and middle age stands of dahurian larch (Larix gmelinii Rupr) in Daxing′anling district were compiled base on the growth theory of Von Bertalanffy. We have developed time-site-density continuous equations and studied the growth and yield of DBH, height, basal area and volume of different origins, sites and densities of dahurian larch. The result reflected the present growth situation of dahurian larch and provided the theoretical basis for constructing forestry tables and taking corresponding management treatments.

本文通过内蒙古大兴安岭林区兴安落叶松幼、中龄林可变密度收获表编制过程,根据生长理论,建立时间-立地-密度连续型方程,对该树种不同起源、不同立地、不同密度的林木的直径、树高、断面积和蓄积量的生长规律进行了研究,所得结果即反映内蒙古大兴安岭林区兴安落叶松幼、中龄林的现状,又为编制林业数表和采取相应经营措施提供理论根据。

Growth of average stand DBH is discussed based on relationship between stand growth and stand density. Growth equation of average stand DBH is fitted with data of 65 plots and 130 stem analyses of site index 8 meters of Dahurian larix collected from Daxinanlin in Neimenggu. Variable density yield tables of Dahurian larix are constructed based on growth equation of average stand DBH and relationship between average stand DBH and the other stand attributes.

本文从林分生长和林分密度间的关系,探讨了林分平均胸径的生长,并用于内蒙古大兴安岭地区收集的兴安落叶松(Larix gmelinii Rupr.)地位指数18m的65块标准地和130株解析木数据。根据林分平均胸径生长方程和其他林分生长因子的相关规律,探讨编制兴安落叶松天然林可变密度收获表的方法。

 
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